Semimechanical phosphate den



Aug. 20, 1929. D. L. BAKEI-Q l, 72 5,694

SEMIMECHANI GAL PHOSPHATE DEN Filed July 50, 1928 2 Sheets-Sheet lINVENTOR ATTORNEY Aug. 20, 1929. D. L. BAKER 1,725,694

S EMIMECHANI CAL PHOSPHATE DEN Filed July 30, 1928 2 Sheets-Sheet 2 b?Jfyz INVENTOR ATTORNEY Patented Aug. 20, 1929.

UNITED STATES PATIENT OFFICE.

nanny L. BAKER, or ATLANTA, GEORGIA.

SEMIMEGHANICAL PHOSPHATE DEN.

Application filed July 30, 1928. Serial No. 296,409.

of which is continuous, as there are no interruptions for charging anddischarging, and one in which the operators are protected from thefumes.

Another object of the invention is to provide a housing movable aboutits vertical axis and divided into a plurality-of chambers, with meansfor charging one chamber while another chamber is being emptied, with asingle means for charging the cham-. bers in succession and a singleflue for drawing ofl the fumes from the chambers and from the chargingdevice, with means for facilitating the removal of the material from thechambers without the operator entering the chamber.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, il-

lustrated in the acompanying drawings and specifically pointed out inthe appended claims.

In describing my invention in detail, reference will be had to theaccompanying so drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which Figure 1is an elevation, with parts in 7 section, of the invention.

Figure 2 is a vertical sectional view through the housing of thedevice.

Figure 3 is a horizontal sectional view through Figure 2. 1

Figure 4 is a view of the base on which the tracks are located which areengaged by the wheels on the bottom of the housing.

.In these drawings, the numeral 1 indicates a base which forms a supportfor a pair of circular tracks 2, and 3 indicates the ousing which hasthe wheels 4 on its bottom which engage the tracks so that the housingcan be revolved about its vertical axis. The housing is preferably ofrectangular shape in cross section and it is divided into four chambersby the diagonally arranged partitions 5 so that each chamber is oftriangular shape in cross section, with the base of the triangle at theside of the housing. Each chamber is also provided with a sloping bottom6 which slopes downwardly to the side of the housing and each side ofthe chamber is formed with two pairs of door openings 7, one paircommunicating with the lower part of each chamber and the upper pairwith the upper part of each chamber. These openings are closed by thehinged doors 8 which are held in closed position by the bars 9 engagingthe keeper members 10 at the sides of the door open-- ings. As shown inFigures 2 and 3, the sloping bottom 6 of each chamber tends to cause thematerial in the chamber to gravitate toward the lower doors. Flangedopen ings 11 are formed in the top of the housing, one for each chamber,and a mixing pan 12 is supported on the floor 13 above the housing, withits spout 14 depending through an opening in the floor, the parts beingso arranged that as the housing is rotated, the flanged openings willcome under the spout in succession so that the material in the pan candrop through each opening into the chamber below.

The numeral 15 indicates a part of the dust weighing hopper forintroducing the finely ground phosphate into the mixing pan and thenumeral 16 indicates a part of the acid measuring device for introducingthe acid into the pan.

The numeral 17 indicates a flue for conveying the fumes and gases to theusual scrubber through the use of a suction fan,

the lower part of this flue extending through an opening in the floor 13and having a flaring end under which the flanged openings 11 will comein succession as the device is rotated so that the fumes and gases fromthe chambers will be drawn through this flue. A pipe 18 connects theflue with the spout 14 of the mixing pan and a pipe 19 connects themixing pan with the flue. A pipe 20, having a flaring lower end, isconnected with the flue 17 with its lower end adapted to cover theflanged opening 11 of that chamber which has been filled from the mixingpan, but has not reached the discharging position. As will be seen, theflue 17 is so arranged with respect to the spout 14 of the mixing panthat each chamber must make a half its opening 11 is under t erevolution inorder to pass from the charging position, where its opening11 is underso that a workman can stand on this platform and remove thematerial from the chamber to be discharged,= after he has opened thelower doors of said chamber. .A platform -extends around the centralpor-r tion of the housin [so that an operator can stand thereon andoosen the material in the I third chamber is being 0 upper part of thechamber bein discharged Ry; opening the upper doors 0 chamr. From theforegoing it will be seen that when the device is in operation, thehousing is turned to brin the opening 11 of the first chamber under t espout 14 of the mixing pan, so that the materials from the pan can bedischarged into the said chamber. After this chamber is filled, thehousing is moved a quarter turn so as to bring the second chamber under"the s out so that said chamber can be filled. ile the second chamber isbeing filled, the first. chamber has its openin 11 under the pipe 20 sothat the fumes om this chamber will be carried .ofi' through the flue-1'7 and the gases and fumes in the mixing pan and spout will bedischarging through the pipes 18 and 19 into the flue. Then the housingis given another quarter .turn which will bring the third chamber underthe spout of the mixin pan and the first chamber. will be move intodischarfiin position with its opening 11 under t e ue 17 and its dooropenin will be arranged over the hopper '23. i the I arged, the firstchamber is bein discharged by the op er--- ator openin the oors andpulling the material from t e chamber so that it willdrop into'thehopper 23 and thus be elevated by the buckets of the elevator 21.

It will'be seen that the operation is con-- tinuous and-that thephosphate remains in.

' each chamber a predetermined time, according to the capacity of theapparatus and the tonnage desired to be manufactured. The

' workman dig ing the material from eachchamber, is a ways on theoutside '50 that he is not exposed to the heat and fumes and the fumesand gases are carried off from the chambers and from the mixing pan. Theapparatus is compact and the handling of the materials in charging anddischarging the chambers is such as to msure the minimum cost ofproduction and an improved product. It will, of course, be understoodthat the chambers may be formed in other shapes and the housing may bedivided into as many chambers as desired.

What I claim is:-

1. A device of theolass described comprising a housing rotatablysupported so that it can be moved about its vertical axis, means fordividing the housing into a number of chambers, each chamber ha aopening at its top, means for fifing each chamber as the housing isrotated to bring the filling opening of each chamber under the fillingmeans, means for 'dra oif fumes and gases from the chambers an fromthefilling means, each chamber having discharge openings in its sides,doors for closing the same, platforms arranged ,adjacent the dooropenings whereby a workman can draw the material from each chamberwithout enterin the chamber.

2. A device of the class described comhousing rotatabl supported soprising a be moved about its vertical axis,

that it can means for dividing the housing intoa number of chambers,each chamber having a filling opening at its top, means for filling eachchamber as the housing is rotated to bring the filling opening of eachchamber under the filling means, means .for drawin ofi fumes and gasesfrom the chambers an from the fillingineans, each chamber havingdischarge opemngs in its sides, doors for closin the same, platformsarranged adja-v cent t e door openin whereby a workman can draw thematerial from,each chamber without entering the chamber and, a conveyorfor receiving the material discharged from the chambers, said conveyorbeing arranged at that side of the housing which is opposite the fillingmeans so that the housing must be moved a half revolution to place the"filled chamber in discharging position.

3. An apparatus 'of the clas described comprising a base, a circulartrack thereon, a housing, wheels on the bottom of the same engaging thetrack, partitions in the housing dividing the same into a plurality ofchambers, each chamber having a slopipg bottom which slopes downwardlyand outwardly to the outer side of the chamber, upper and lower doors ineach side of the housing, the. housing having flanged openings in itstop, one for each chamber, a mixing 'pan supported above the housingwith its discharge spoutarranged to discharge v into each chamberthrough the filling opening thereof when the housing is rotated to placethe chamber under the spout a flue supported above the housing oppo itethe mixing pan for receiving fumes from each chamber after the housinghas been moved a half turn from the fillin position, a. pipe connectingthe flue with t e mixing pain, a pipe connecting the flue with thefilling opening .of the chamber which has been moved a quarter turn fromits filling position, platforms arranged exteriorl of the housingadjacent the doors thereo a conveyor and a hopper associated with theconveyor and arranged to receive the material removed through, the dooropenings of the chamber which is in discharging position. DARBY L.BAKER.

